Shop the Cutest Nursing Tank Tops. Stylish and Functional.

Help with a form of rash? [Pictures included]?

So, I’m 13 and haven’t changed my deodorant, bedsheets, dryer sheets, or anything of that nature. I woke up on friday with a horrible back ache. Not a sore type with muscles but as if i was punched or cut on the back. I looked and saw markings which I thought to be from my tank top I slept in. Later that day it got red and inflamed and I went to the nurse. I got calamine put on it, but nothing is helping. It is now sunday and it is even more red, irritated and has orange tips. The pictures will help [I swear its not gross]. my whole upper back is aching and the rash spot is like aching/in pain. We’re going to the doctor bu I wanted some opinions. Anyone know what is going on here?

Pictures: